I had a tappin on my s2rst for a while now.Although I suspected it was a big end I was told it was a hydraulic lifter.On mon I was followin a mate in his 3i down the motorway and instead of doin 70 like he promised,he went hell for leather.After about 30 miles one of the big ends decided it had had enough.I had to drive the car home (100 miles) and by the time I got home it wouldnt run.I know I shouldnt have driven it but had no choice.What I want to know is what other damage might I have done?I have a reground crank and new shells under the stairs but I have been told that I have probably knackered the bores.Can anyone enlighten me.Cheers everyone.